@bastereo Make sure that you can prove to that IRS that you are not making a profit from the sale of your gear. especially if you use PayPal and sell each item separately. PayPal sometimes send the IRS info on money transfers if they think you are a business.
If you do not have the sales receipt, I would just look up the MSRP and record it in some document before you sell anything.
If you do not have the sales receipt, I would just look up the MSRP and record it in some document before you sell anything.